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The news media were to become regular users of mobile links to satellites using specially equipped trucks, and much later via special satellite videophones in a briefcase.
Videoconferencing systems throughout the 1990s rapidly evolved from very expensive proprietary equipment, software and network requirements to a standards-based technology readily available to the general public at a reasonable cost.A number of organizations believed that videotelephony would be superior to plain voice communications.However video technology was to be deployed in analog television broadcasting long before it could become practical—or popular—for videophones.Telepresence may refer either to a high-quality videotelephony system (where the goal is to create the illusion that remote participants are in the same room) or to meetup technology which goes beyond video into robotics (such as moving around the room or physically manipulating objects).Videoconferencing has also been called "visual collaboration" and is a type of groupware.Although not as widely used in everyday communications as audio-only and text communication, useful applications include sign language transmission for deaf and speech-impaired people, distance education, telemedicine, and overcoming mobility issues.
It is also used in commercial and corporate settings to facilitate meetings and conferences, typically between parties that already have established relationships.
During the first manned space flights, NASA used two radio-frequency (UHF or VHF) video links, one in each direction.
TV channels routinely use this type of videotelephony when reporting from distant locations.
Attempts at using normal telephony networks to transmit slow-scan video, such as the first systems developed by AT&T Corporation, first researched in the 1950s, failed mostly due to the poor picture quality and the lack of efficient video compression techniques.
The greater 1 MHz bandwidth and 6 Mbit/s bit rate of the AT&T Picturephone in the 1970s also did not achieve commercial success, mostly due to its high cost, but also due to a lack of network effect — with only a few hundred Picturephones in the world, users had extremely few contacts they could actually call to, and interoperability with other videophone systems would not exist for decades.
Videotelephony developed in parallel with conventional voice telephone systems from the mid-to-late 20th century.